在压力容器、锅炉和管道系统中，超压是引发爆炸事故的头号原因。安全阀就是这道“非常后防线”——当系统压力超过设定值时，安全阀自动开启泄压；压力恢复正常后自动关闭，将事故消灭在萌芽状态。良工阀门集团的安全阀产品广泛应用于石油、化工、电力、核电等领域。

Overpressure is the leading cause of explosion accidents in pressure vessels, boilers, and piping systems. The safety valve is the "last line of defense" - when the system pressure exceeds the set value, the safety valve automatically opens to release pressure; After the pressure returns to normal, it will automatically shut down, eliminating the accident in its early stages. Lianggong Valve Group's safety valve products are widely used in fields such as petroleum, chemical, power, and nuclear power.

一、安全阀的工作原理与分类

1、 Working principle and classification of safety valves

安全阀是一种自动阀门，其工作原理是利用弹簧力或重锤力与介质压力之间的平衡来控制阀门的开启和关闭。当系统压力低于整定压力时，阀瓣在弹簧力作用下紧贴阀座，保持密封。当系统压力超过整定压力时，介质压力克服弹簧力，阀瓣被推开，介质排出泄压。压力降至回座压力后，阀瓣自动复位。

A safety valve is an automatic valve that works by using the balance between spring force or heavy hammer force and medium pressure to control the opening and closing of the valve. When the system pressure is lower than the set pressure, the valve disc tightly adheres to the valve seat under the action of spring force, maintaining sealing. When the system pressure exceeds the set pressure, the medium pressure overcomes the spring force, the valve disc is pushed open, and the medium is discharged to relieve pressure. After the pressure drops to the reseating pressure, the valve disc automatically resets.

良工安全阀的主要类型：

The main types of Lianggong safety valves are:

弹簧式安全阀（A41W-16P） ——利用弹簧力控制开启压力，结构简单、灵敏度高。

Spring type safety valve (A41W-16P) - uses spring force to control the opening pressure, with a simple structure and high sensitivity.

先导式安全阀——主阀由导阀控制，适用于大口径、高压力工况。

Pilot operated safety valve - The main valve is controlled by a pilot valve and is suitable for large-diameter, high-pressure working conditions.

全启式安全阀——阀瓣开启高度大，排放能力强。

Full opening safety valve - the valve disc has a large opening height and strong discharge capacity.

微启式安全阀——阀瓣开启高度小，适用于液体介质。

Micro opening safety valve - with a small valve disc opening height, suitable for liquid media.

二、良工安全阀的技术参数详解

2、 Detailed explanation of technical parameters of Lianggong safety valve

A41W-16P DN100×100——弹簧式安全阀，公称压力1.6MPa，材质304不锈钢，进出口口径均为100mm。整定压力（起跳压力）为1.1MPa，即在1.1MPa压力下阀门自动开启泄压。

A41W-16P DN100 × 100- Spring type safety valve, with a nominal pressure of 1.6MPa, made of 304 stainless steel, and an inlet and outlet diameter of 100mm. The set pressure (jump pressure) is 1.1MPa, which means that the valve will automatically open and release pressure under 1.1MPa pressure.

良工安全阀的材质选择十分丰富，从碳钢、不锈钢（304、316）到特种合金均有覆盖。工作压力覆盖从低压到高压的广阔范围。连接方式包括法兰连接、螺纹连接、焊接连接等。

The material selection for Lianggong safety valves is very diverse, covering carbon steel, stainless steel (304, 316), and special alloys. The work pressure covers a wide range from low pressure to high pressure. The connection methods include flange connection, threaded connection, welded connection, etc.

三、安全阀选型的核心要点

3、 The core points of selecting safety valves

1. 整定压力——安全阀的开启压力，建议低于容器或管道的设计压力。

1. Set pressure - The opening pressure of the safety valve must be lower than the design pressure of the container or pipeline.

2. 排放能力——安全阀在开启状态下单位时间内能排放的介质流量，建议大于系统可能产生的非常大超压量。

2. Discharge capacity - The flow rate of the medium that can be discharged per unit time when the safety valve is in the open state must be greater than the maximum overpressure that the system may generate.

3. 介质特性——气体、液体、蒸汽对安全阀的结构和材质有不同要求。

3. Medium characteristics - gases, liquids, and vapors have different requirements for the structure and material of safety valves.

4. 背压影响——安全阀出口侧的压力会影响开启压力和排放能力。

4. Back pressure effect - The pressure on the outlet side of the safety valve will affect the opening pressure and discharge capacity.

5. 材质选择——腐蚀性介质需选用不锈钢或特种合金。

5. Material selection - Stainless steel or special alloys should be used for corrosive media.

四、安全阀的安装与定期检验

4、 Installation and Regular Inspection of Safety Valves

安全阀应垂直安装，且不得随意拆卸。进口管道上不得装设明显阀门。安全阀建议定期进行校验，包括整定压力校验和密封性试验。良工安全阀广泛应用于电站、核电、石油、化工等领域，产品质量可靠、性能稳定。

The safety valve should be installed vertically and should not be disassembled arbitrarily. No valves shall be installed on the imported pipeline. Safety valves must be regularly calibrated, including set pressure calibration and sealing tests. Lianggong safety valves are widely used in power plants, nuclear power, petroleum, chemical and other fields, with reliable product quality and stable performance.

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